Hello everyone , we have a big problem with our pool. We just emptied it to make new grout , and now there is an horrible smell coming out from 2 Pipes at the bottom . The smell is like very fishy or like when you go to some beaches with old sludge ( not sure this is the word sorry ) it does smell very very very bad. This night some water came out of it and its even worst .

We just bought this house ( In thailand so no idea if the system is good or not ) , we didnt smell anything when it was filled with water.

What were your numbers before you emptied it and how did you maintain it?If your chlorine was low you may well have had some small animal get in and die when the chlorine was raisedFC:TC:pH:TA:CH:CYA:Pool chemicals:My pump & filter:I would suggest flushing your pipes out with waterIf you can draw from main drain only put some water in the pool with your MPV set to recirculate (not filter) and pump the water round. You will also need to check you pump basket for any organic matter trapped in itYou have to get your plumbing as clean as possible before refilling and balancing

Hello thanks for answer. Im actually a total noob ... i just bought this small villa. I emptied the pool to have the grout remade. And when the pool was empty this happened. I have no idea about the chemicals status i had before doing that. Will try to flush the pipe out and see whats up. Thanks

At least when you clean it out you will be starting with a clean slateI don't know what chemicals are readily available in Thailand but you should be able to purchase a lot of these locallyLiquid chlorine (sodium hypochlorite or plain bleach not splashless or scented)to raise chlorineMuriatic acid (hydrochloric acid) to lower pH and TABicarbonate of soda to raise TAAeration will raise pH onlySoda ash will raise pH and TAYou will also have to put Cyanuric Acid (Stabiliser/Conditioner) to help buffer your chlorineYou can get stabilised chlorine (tabs & granules) to raise your CYA but only till you reach your appropiate level as excessive CYA renders your chlorine ineffectiveFor every 10 ppm Free Chlorine (FC) added by Trichlor, it also increases Cyanuric Acid (CYA) by 6 ppm.For every 10 ppm FC added by Dichlor, it also increases CYA by 9 ppm.For every 10 ppm FC added by Cal-Hypo, it also increases Calcium Hardness (CH) by at least 7 ppmYou will need to raise your CH to protect your new groutYou also need to get a decent FAS/DPD testing kit to check for the previously mentioned chemical levels and combined chlorine

Hi Slyou22, where do those pipes lead to?Fish smell is often ammonia based, either way not good as it will lead to bacteria somewhere. Chlorine is slow to act on ammonia based compounds and biofilms. I would suggest you look for chlorine dioxide. Maybe you can get that in dry tablet form if you can't find the liquid but block off the other end of where those pipes lead to? and give the pipes a good soak over night.